From 99d44f526cda66fabc318dbe0e26c431325ca854 Mon Sep 17 00:00:00 2001
From: Wuzzy <almikes@aol.com>
Date: Sat, 1 Apr 2017 07:10:05 +0200
Subject: [PATCH] Change dirt snow surface when placing snow on top

---
 mods/ITEMS/mcl_core/nodes.lua | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/mods/ITEMS/mcl_core/nodes.lua b/mods/ITEMS/mcl_core/nodes.lua
index 28a434b5..b814d0c0 100644
--- a/mods/ITEMS/mcl_core/nodes.lua
+++ b/mods/ITEMS/mcl_core/nodes.lua
@@ -1907,6 +1907,29 @@ for i=0,3 do
 	end
 end
 
+local on_snow_construct = function(pos)
+	local npos = {x=pos.x, y=pos.y-1, z=pos.z}
+	local node = minetest.get_node(npos)
+	if node.name == "mcl_core:dirt_with_grass" then
+		minetest.swap_node(npos, {name="mcl_core:dirt_with_grass_snow"})
+	elseif node.name == "mcl_core:podzol" then
+		minetest.swap_node(npos, {name="mcl_core:podzol_snow"})
+	elseif node.name == "mcl_core:mycelium" then
+		minetest.swap_node(npos, {name="mcl_core:mycelium_snow"})
+	end
+end
+local on_snow_destruct = function(pos)
+	local npos = {x=pos.x, y=pos.y-1, z=pos.z}
+	local node = minetest.get_node(npos)
+	if node.name == "mcl_core:dirt_with_grass_snow" then
+		minetest.swap_node(npos, {name="mcl_core:dirt_with_grass"})
+	elseif node.name == "mcl_core:podzol_snow" then
+		minetest.swap_node(npos, {name="mcl_core:podzol"})
+	elseif node.name == "mcl_core:mycelium_snow" then
+		minetest.swap_node(npos, {name="mcl_core:mycelium"})
+	end
+end
+
 minetest.register_node("mcl_core:snow", {
 	description = "Top Snow",
 	_doc_items_longdesc = "Top snow is a thin layer of snow.",
@@ -1929,6 +1952,8 @@ minetest.register_node("mcl_core:snow", {
 	},
 	groups = {shovely=1, attached_node=1,deco_block=1, dig_by_piston=1},
 	sounds = mcl_sounds.node_sound_snow_defaults(),
+	on_construct = on_snow_construct,
+	on_destruct = on_snow_destruct,
 	drop = "mcl_throwing:snowball 2",
 	_mcl_blast_resistance = 0.5,
 	_mcl_hardness = 0.1,
@@ -1943,6 +1968,8 @@ minetest.register_node("mcl_core:snowblock", {
 	stack_max = 64,
 	groups = {shovely=1, building_block=1},
 	sounds = mcl_sounds.node_sound_snow_defaults(),
+	on_construct = on_snow_construct,
+	on_destruct = on_snow_destruct,
 	drop = "mcl_throwing:snowball 4",
 	_mcl_blast_resistance = 1,
 	_mcl_hardness = 0.2,